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Windows 7 Backup Error 0x8078002A

General discussion

I upgraded my main computer to Windows 7 Home Premium which has a C drive (500 GB) and a Raid 5 SATA array (2.7 TB) on drive D:. I tried to backup the install as an image on the D: drive and I get the following error code 0x8078002A and a comment about an I/O error and one of the backup files could not be created.

I plugged in a USB external hard drive in and it works.

This computer is part of a gigabit switched home network (the main file server), so I tried to back up one of the home computers (running W7 Professional) through the network onto a shared folder on drive D: and I get the same error. The backup gets 27% of the way through on both computers and then fails.

I have updated the Raid driver (I had to as part of the W7 install).

Any ideas or solutions on this one?

Secondly, can I copy the backup off the USB drive onto the D: drive and have a reliable backup, or will that corrupt the backup?

All replies

I get the same error code only in case of activating the box for creating an image for C (I am using an external disc via an USB connection for the back-up). Not activating this box allows normal back-up. I was not able to find a solution for this problem (image creation) in web. But I found a lot of some complaints. Maybe this is an unresolved problem?

Immediately after running the WD Quick Formatter tool and using the Factory Default configuration I attempted a backup with only the system image selected and it worked without error. I then ran another backup with the system image as well as some user
data files selected and that, too, completed successfully.

FWIW, here are the results of running fsutil fsinfo ntfsinfo f: on my drive (which is loaded as F:)

However, is anyone aware if Microsoft is building a fix so that drives with 4K logical sector sizes are not an issue? This error is going to effect more people over time with the increasing number of 2.5 TB and larger hard drives on the market.

Thanks RayD for the tip. I unfortunately can not implement the fix as suggested by RayD as I have too much data and can not reformat my backup external hard drive.

Have tried all means of undertaking a full back up in Windows 7 using an Omega 1TB and the same error message 0x8078002A using MS Backup. However by backing up separate files not exceeding 500 MB all found entirely satisfactory. Omega say they will advise
me when the solution is resolved, but it is now almost two years and no answer has been forthcoming. Can I say that it is not possible to resolve this problem, which will get worse with the increase of large backup drives. Surely somebody must have an answer
or must we all go back to a larger number of smaller backup hard drives.

I use also an 'old' Iomega "Prestige" 1TB model LPHD-UP3 connected by USB3 to fast recent (end 2011) laptop with W7 SP1 x64 with all KBs (this Vaio laptop works like a dream).

Windows BU failed three times (I tried with & without external HD cache). So this looks like a lack lustre "Prestige" solution.

Yesterday, I just saved 100 GB of data from Laptop to this external drive (explorer copy/paste) and it went fine (64MB/s average throughput). I looked at the characterisics of this external drive with HD Tune Pro (smart etc.) and HD drive seemed OK.
Chckdsk /f /x ran on it with no problem found.

So, one would tend to infer that the internal drive in this external box is probably OK.

However, Iomega "added value" between the hard drive & my laptop (I mean the hardware component + Iomega software to run the usb3 to sata III interface) may be a technical disaster (product ref p/n 31922900 s/n GSAB136901) in this specific instance,
as I am not the only one who suffers damages due perhaps to this non-working product as a Windows backup external solution.

I have also a similar Raidsonic ICY Box ib-273stu3-b external HD enclosure but I have lent it to a kid to restore his clugged & corrupted W7 OS on his laptop this week at his boarding school so I will try it next week with WS BU to circumvent
the issue. I know it works well with AHTI but I don't remember with WS BU. NB: I am not an immoderate fan of AHTI. It let me down at restore time twice on a complex config and I could recover thanks to another WS BU file ("belts & braces"
practice). However, here, I just mention it worked.

I have also another similar but heavier multi-purposes Icy Box IB-120CL-U3 that I could use for tests but I have to change desk & room and I feel lazy today. Next week hopefully.

After the first failure yesterday, I used Acronis True Image Home also for same OS full image to the network NAS. It took 2 hours last night on a 100 Mb/s ethernet connection for 60GB but at least it finished OK and this machine is protected if its
HD crashes (all user data is saved separately on the fly (real time) with Goodsync to a NAS in RAID1 + 6 periodic AHTI incremental images for "belt & braces").

As I am pig headed, I tried WS Backup again twice today. Same failures so I am satisfied the behaviour of this set is consistent!

I post error events logs & screen capture picture in appendix, hoping more knowledgeable people can do something with it or learn from the incident for themselves.

Ideas to solve welcomed.

Needless to repeat that Back-Ups can be CRITICAL for all of us, so failures to BU or to Restore are not be looked at lightly.

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